Adjustable wood cutting tool



Patented June 17, 1941 UNIT D. STATES PATENT GEFICE ADJUSTABLE woon CUTTING Tool.

7 John 'H. Hewett, Detroit, Mich. 4 7 Application August 16, 1939, Serial No. 290,337

2 Claims. o1.144 232) The present invention relates to improvements in tools adapted for wood working machinery in general, but has special reference to :an improved wood cutting tool adapted to be secured to the horizontal spindle of the wood working machine I for purpose of cutting grooves into wood surfaces.

One of the advantages of the invention is that it is adjustable in a manner so that it will cut one, two, three or four grooves simultaneously.

The invention is also arranged in a pair or more of cutting units whereby all of the units may be used simultaneously.

With the foregoing in mind, it will become readily apparent that the invention possesses further advantages, all of which will be clearly revealed during the course of the following detailed description, illustrated throughout the accompanying drawing, and more fully pointed out in the appended claims.

With reference to the drawing:

Figure 1 is a reduced elevation of one of the complete cutting units; and Figure 2 is a reduced side elevation thereof.

Figure 3 is a reduced elevation of the body plate employed; and Figure 4 is a reduced side elevation thereof.

Figure 5 is an elevation showing two of the cutting units assembled as they will appear ready to operate.

Figure 6 is an elevation of one of the cutting members; and Figure 7 is a front elevation thereof; also Figure 8 is a side elevation of the same.

Figure 9 is an elevation of the separating collar; and Figure 10 is an end elevation thereof.

Figure 11 is a group view of the bolt assembly.

Figure 12 is a fragmentary sectional view showing a single groove cut in a piece of wood.

Figure 13 is a sectional view through a piece of wood having two grooves cut therein.

Figure 14 is a similar view showing three grooves cut in a piece of wood.

Figure 15 is a sectional view through a piece of wood having four grooves cut therein.

The invention comprises a plurality of cutting units, and each of said units has body plate portion of the cutting members'is semi-circular as at 6, and this portion is adapted to contact or engage the respective studs 1 which are permanently fixed with plate I and extending upon both sides of said plate as clearly shown in Figures 3 and 4. .The cutting members are detachably secured to plate I by bolt 8, washer 9 and nut lfL said 'bolt. passing :through arcuate slots :H within plate .I where shown.

In this manner studs 1 acting in conjunction with semi-circular portions 6 hold the cutting members rigidly in their proper position as shown in Figures 1, 2 and 5.

Aperture l2 within body 3 of the cutting members are for the accommodation of bolts 8.

The single cutting unit indicated in Figures 1 and 2 may be used as it is shown, and which will cut grooves into the wood as in Figure 12 or in Figure 13, and if the double cut is used, the distance between the grooves will correspond to the distance between the cutting edges 5 at the position of Figure 2. For cutting the single groove shown in Figure 12 both cutting members are placed upon the same side of plate I, and in this manner the cutting edges of both members will track. It is understood that by virtue of cutting edges 5 being in opposed relation, the cutting members may be readily reversed if desired.

I of the formation as indicated, and said plates are secured to the spindle of the wood working machine in any approved manner by the use of aperture 2 therein where shown.

Each of plates l is adapted to accommodate a pair of cutting members, and each of said cutting members has body 3, and said body having upper extended arcuate portion 4 and within this portion are U shape cutting edges 5, which are disposed in opposed relation. The opposite end When two cutting units are used as in Figure 5, for cutting the three grooves shown in Figure 14 or the four grooves shown in Figure 15 spacing collar I3 is provided and is adapted to be positioned intermediate plates I, thereby positively holding the cutting units in a positive spaced apart position and insuring maximum accuracy while in operation and also when idle. Aperture [4 within collar l3 allows the same to pass over the spindle of the wood working machine. Arcuate notches I5, where shown upon collar l3, are adapted to contact or engage studs 1 as in Figure 5, and this feature positively locks the cutting members in their respective positions.

Because of the particular U shape cutting edges 5 and the arcuate portions 4 of the cutting members, the locking means of bolts 8, portions 8 of said cutting members and studs 1 coacting with said portions, also spacing collar l3, these tools are of outstanding value, and are unsurpassed by no other tool for the accomplishment of this purpose.

In conclusion, let it be understood that the complete disclosure herewith is merely illustrative of the general principle of the invention sought to be protected by Letters Patent, and that any changes made during any probable further development of the invention for the market would fall directly within the scope of the claims.

Having thus fully described my invention, what I claim as new is:

1. In an adjustable wood cutting tool, a pair of cutting units disposed transversely of each other, each unit consisting of a plate having arcuate end edges, studs extending through end portions of said plate concentric with the arcuate end edges thereof and projecting from opposite side faces of the plate, said plate being also formed with arcuate slots located between the studs and the arcuate end edges of the plate and concentric thereto, a spacing disc between central portions of the plates having its peripheral edge formed with circumferentially spaced arcuate recesses receiving side portions of the protruding inner ends of said studs to maintain the plates in predetermined crossed relation to each other, cutters having arcuate blades projecting beyond the outer edges of the plates and fiat shanks in contacting engagement with the side faces of the plates, said shanks having arcuate recesses at their inner ends receiving the side portions of the protruding ends of said studs to mount the cutters for pivotal adjustment, and bolts passing through the shanks of the cutters and the arcuate slots of the plates to limit pivotal Cil adjustment of the cutters and releasably secure the cutters in adjusted positions with respect to said shanks.

2. In an adjustable wood cutting tool, a pair of plates disposed in transverse crossed relation to each other, a disc between said plates, the plates and the disc being formed at their centers with registering shaft-receiving openings, said disc having its periphery formed with recesses spaced from each other circumferentially thereof, studs fixed with said plates midway of their widths and in spaced relation to their ends with end portions of the studs projecting from the inner and outer side faces of the plates, the protruding inner end portions of said studs having side portions engaged in the recesses of said disc to maintain the plates in predetermined crossed relation to each other, cutting members having blades projecting beyond the ends of said plates and shanks disposed in contacting engagement with the side faces of the plates and at their inner ends formed with arcuate recesses snugly receiving the side portions of the protruding ends of the studs to mount the cutters for pivotal adjustment transversely of the plates, and fasteners for releasably securing said cutters in angularly adjusted positions with respect to said plates.

JOHN H. J EWETT. 

